That's the point. You can't just take any nice looking phone - be it a Xiaomi or Motorola Razer (the flip ones) - and degoogle it. You are tied to the maintainers painstaikingly extracting vendor blobs and wasting literal gigabytes of storage for an Android buildroot (50GB avg.). And once said maintainers grow bored, the related phone support might be dropped. I was lucky to find out that my Razer Phone 2 was fully supported; has been my daily driver for two years and some now. But a friend, who bought an Oppo Find X5 Lite (aka. Reno7 5G) can't. Fastboot runs as a user service (fastbootD), bootloader unlocks are not supported.

So - yes. Degoogled phones are great, if you happen to have one that is supported...